Add OSDM to other mutlimodal data formats section

[sarahsagner]

https://osdm.io/

Simplifies the booking process for public transport trips

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
7 out of 16 committers have signed the CLA.

✅ emmambd
✅ dancesWithCycles
✅ isabelle-dr
✅ 1Maxnet1
✅ carlfredl
✅ mil
✅ tbuckl
❌ gabrielvazdemelo
❌ Joaobazzo
❌ mesozoic-drones
❌ rafapereirabr
❌ mem48
❌ said026
❌ Simha-Kalimipalli
❌ fbarbe00
❌ AdrianaCeric
_{You have signed the CLA already but the status is still pending? Let us recheck it.}